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Earth boring apparatus for sinking shafts and method of...

E - Fixed Constructions – 21 – D
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Earth boring apparatus with control valve

E - Fixed Constructions – 21 – B
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Earth boring auger

E - Fixed Constructions – 21 – B
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Earth boring auger

E - Fixed Constructions – 21 – B
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Earth boring auger

E - Fixed Constructions – 21 – B
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Earth boring auger

E - Fixed Constructions – 21 – B
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Earth boring bit

E - Fixed Constructions – 21 – B
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Earth boring bit for soft to hard formations

E - Fixed Constructions – 21 – B
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Earth boring bit with axially radiussed roller bearing race

E - Fixed Constructions – 21 – B
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Earth boring bit with bearing sleeve

E - Fixed Constructions – 21 – B
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Earth boring bit with composite anti-galling bearing surface

E - Fixed Constructions – 21 – B
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Earth boring bit with eccentric seal boss

E - Fixed Constructions – 21 – B
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Earth boring bit with eccentrically formed bearing surface

E - Fixed Constructions – 21 – B
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Earth boring bit with eccentrically machined bearing pin

E - Fixed Constructions – 21 – B
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Earth boring bit with extended gage

E - Fixed Constructions – 21 – B
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Earth boring bit with gridded ferrous bearing surface

E - Fixed Constructions – 21 – B
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Earth boring bit with improved rigid face seal assembly

E - Fixed Constructions – 21 – B
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Earth boring bit with labyrinth seal protector

E - Fixed Constructions – 21 – B
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Earth boring bit with pin mounted compensator

E - Fixed Constructions – 21 – B
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Earth boring bit with pressure compensating bearing seal

E - Fixed Constructions – 21 – B
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